.flex-def {
  display: flex;
}

.flex-zCenter {
  justify-content: center;
}

.flex-zBetween {
  justify-content: space-between;
}

.flex-zAround {
  justify-content: space-around;
}

.flex-zEnd {
  justify-content: flex-end;
}

.flex-zStart {
  justify-content: start;
}

.flex-cCenter {
  align-items: center;
}

.flex-cStart {
  align-items: start;
}

.flex-cEnd {
  align-items: flex-end;
}

.flex-cBaseline {
  align-items: baseline;
}

.flex-cStretch {
  align-items: stretch;
}

.flex-zTopBottom {
  flex-direction: column;
}

.flex-zBottomTop {
  flex-direction: column-reverse;
}

.flex-zLeftRight {
  flex-direction: row;
}

.flex-zRightLeft {
  flex-direction: row-reverse;
}

.flex-item {
  flex-grow: 1;
}

.flex-order {
  order: 1;
}

.flex-max {
  flex: 1;
}

.flex-warp {
  flex-wrap: wrap;
}

.overflow1 {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.overflow2 {
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}
.overflow3 {
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.fl {
  float: left;
}

.fr {
  float: right;
}